Hermann wulfing luer



UNITED STATES PATENT OFFICE.

THEODORE GEORGEN,

OF NEW YORK, N. Y.

SYRINGE.

SPECIFICATION forming part of Letters Patent No. 583,382, dated May 25,1897.

Application filed December 11, 1896. $erial No. 615,267. (No model.)Patented in France November 6, 1894, No. 242,646; in Germany April 20,1895, No. 88,352; in Austria November 4, 1895, No. 46/4136, and inEngland February 17,1896,

To all whom it may concern.-

Be it known-that I, HERMANN VVULFING IliiER, of Paris, France, haveinvented new and useful Improvements in Syringes, (for which I haveobtained Letters Patent in France, No. 242,646, dated November 6, 1894;in England, No. 3,524, dated February 17, 1896; in Germany, No. 88,352,dated April 20, 1895; in Austria, dated November 4, 1895, register-book45, page 41.86,) of which the following is a full, clear, and exactdescription.

This invention relates to syringes used for injecting medicine; and theobject is to provide a syringe having no detachable parts such asglands, stuffing-boxes, packings, or the like-and which may withoutdifficulty be kept perfectly clean and antiseptic, and, further, to soconstruct a syringe that there is a practically air and liquid tightconnection between the cylinder and plunger.

I will describe a syringe embodying my invention, and then point out thenovel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views.

Figure 1 is an elevation of a syringe embodying my invention, showingthe plunger as partly drawn out. Fig. 2 is a partial elevation andpartial longitudinal section, and

Fig. 3 is a section through the line 3 3 of Fig. 1,

The syringe comprises a glass cylinder or barrel 1, having a reducedoutlet end 2 and an annular flange 3 at its opposite end. This flangemay have one or more flattened portions 4, which by engaging with atable or other support will prevent the syringe from rolling. Movable inthe cylinder or barrel 1 is a glass plunger 5, the body portion of whichis of a length substantially that of the cylinder or barrel, and theouter end of the plunger may be provided with a finger-piece or knob 6.It is desired that there shall be a practically air and liquid tightconnection between the plunger and cylinder or barrel. I carry out thispart of the improvement by grinding the inner surface of'the cylinder orbarrel throughout its cylindrical length, as indicated at 7, and theexterior of the plunger throughout the length of its body portion willalso be ground, as indicated at 8. By the close connection between theparts it will be obvious that the necessary suction will be producedwhen drawing out the plunger to draw liquid into the cylinder.

A syringe carefully constructed as described, requires no packing ofasbestos or the like, and therefore it can be kept perfectly clean andantiseptic with the least possible trouble.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. As a new article'of manufacture, a syringecomprising a glass cylinder having its interior surface ground from endto end, and a glass plunger operating in said cylinder, the said plungerhaving its body portion ground on its exterior and having a lengthsubstantially equal to that of the cylinder, substantially as described.

2. As a new article of manufacture, a syringe comprising a glasscylinder or barrel portion having its interior surface ground and havinga reduced outer end, and an annular flange on its opposite end formedwith a flattened portion, and a glass plunger for operating in thecylinder the said plunger having its body portion ground to closelyengage against the interior of the cylinder and the said plunger havinga length substantially equal to that of the cylinder, substantially asdescribed.

I-IERM ANN WULFING LUER.

Witnesses:

EDWARD P. MAOLEAN, JAMEs ALLISON BOWEN.

